Question

va roog
am nevoie urgent
dau coroana ​

Answer 1

a) 2x+7=3x-2=>7=3x-2-2x=>7=x-2=>x=7+2=9

b) 7x+3-3x=4x+3=>4x+3=4x+3

c) 2+6(4x-2)=9-5(2x+3)=>2+24x-12=9-10x-15=>24x-10=-10x-6=>24x=-10x+4=>34x=4=>x=8,5

d)25-4(2x-3)=16+(5x-4)×2=>25-8x+12=16+10x-8=>37-8x=8+10x=>37-8=10x+8x=>31=18x=>x=1,7(2)

e)2x-5+8x=10x+8=>10x-5=10x+8=>10x=10x+13=>x=mulțimea vidă (nu exista soluție)

f)5-3x=8x+2=>5-2=8x+3x=>3=11x=>x=3,(6)

g)5+3(10x+5)=4-3(8x-2)=>5+30x+15=4-24x+6=>30x+20=10-24x=>30x+24x=10-20=>54x=-10=>x=-5,4

h)3(x+2)-2(1-x)=4x+5=>3x+6-2+2x=4x+5=>5x+4=4x+5=>5x-4x=5-4=>x=1.